6 June 2021 IODP Dictionary -A- A ampere (also amp; unit of electrical current) Å Angstrom (unit of length = 10−10 m) a* color reflectance component (no unit) a‛a lava AABW Antarctic Bottom Water AAD Australian-Antarctic discordance AAG Australo-Antarctic Gulf AAIW Antarctic Intermediate Water ABI acoustic borehole image [logging] ablation (use “laser ablation”) ABM assigned board member (of the ERB) [publications] aboard [but “on board”] ABS American Bureau of Shipping [logistics] abyssal AC alternating current (n., adj.) ACC Antarctic Circumpolar Current accretion ACEX Arctic Coring Expedition [IODP Exp 302] acicular acidification acid-insoluble (adj.) acidity (use “pH”) acknowledgments acme zone ACORK advanced circulation obviation retrofit kit acoustic impedance (n., adj.) AD Antarctic Divergence [science] A/D analog-to-digital ADCB advanced diamond core barrel [drilling] adcumulate admixture ADN Azimuthal Density Neutron [logging] adnVISION [logging] adsorption advection aeolian (use eolian) 1 6 June 2021 IODP Dictionary AES atomic emission spectroscopy [science, chemistry] AF alternating field (n., adj.) [science, paleomagnetism] aff. related to [Latin affinis] [science, biostratigraphy] affine AGI American Geophysical Institute agglomerate agglutinated aggradation; aggradational AGU American Geophysical Union AHC active heave compensator [drilling] (IODP use “WHC”) air fall (n., adj.) air gun (n., adj.) Albian (Alb.) albitization alkalinity alkanes alkenones allanite allochthonous ALN alien corer [drilling; ESO] alongshore (adj.) along-slope (n., adj.) aluminium (use “aluminum”) aluminosilicates amagmatic ammonium (NH4; not “ammonia”) AMO anaerobic methane oxidation amphibolitization AMS (1) anisotropy of magnetic susceptibility [science, paleomagnetism]; (2) accelerator mass spectrometry/spectroscopy [science, radiocarbon dating] AMST archive multisensor track (ODP; replaced by “SHMSL” in IODP) AMU atomic mass unit; also “amu” amygdule (not “amygdale”) amygdaloidal analcite (use “analcime”) analog anastomosing AND azimuthal neutron density [logging] 2 6 June 2021 IODP Dictionary ANDRILL Antarctic Geological Drilling anion Anomaly M0 (and others; capitalize “Anomaly” with a number) ANSI American National Standards Institute Antarctic Convergence Antarctic Divergence Antarctic Water Mass anthracene ANZIC Australia-New Zealand IODP Consortium AO acridine orange [science, microbiology] AODC acridine orange direct count method [science, microbiology] AOM anaerobic oxidation of methane APC advanced piston corer [drilling] APCT-3 advanced piston corer temperature [drilling] (takes the word tool when used [e.g., we used the APCT-3 tool]) aphanitic aphyric API American Petroleum Institute API units natural gamma ray units; also “gAPI” [logging] APL Ancillary Project Letter APLC near-array porosity [logging] apophyses APP Annual Program Plan [publications] apparent polar wandering appendixes (not “appendices”) APS Accelerator Porosity Sonde (also “IPLT sonde”) [logging] Aptian (Apt.) APWD annular pressure while drilling [drilling] APWP apparent polar wander path [science, paleomagnetism] aq aqueous Aquitanian (Aquit.) Archaebacteria (use “Archaea”) ARC Australian Research Council Archie’s law [formation factor] ARI Azimuthal Resistivity Imager [logging] ARM anhysteretic remanent magnetization [science, paleomagnetism] ash fall (n., adj.) ASGR ANTARES Spectral Natural Gamma Probe [logging] 3 6 June 2021 IODP Dictionary ASK automatic stationkeeping [ship] ASR anelastic strain recovery ASTM American Society for Testing and Materials ATP adenosine triphosphate [science, microbiology] authigenic auto- (generally closed up as a prefix) autobrecciated autochthonous AUV autonomous underwater vehicle AVS automated vane shear [science, physical properties] 4 6 June 2021 IODP Dictionary -B- b barn (unit of area = 10−28 m2) b* color reflectance component (no unit) b.y. billion years b/e− (unit of photoelectric effect) [logging] back arc (n.) back-arc (adj.) (not backarc) [GOG5, AGI Thesaurus] back off (n., adj.) [drilling] backfill backflow backpressure backreaming [drilling] backscatter back thrust (n.) [GOG5] backtitrated backup (n., adj.) back up [v.] band-pass (adj.; not used as a noun) bandwidth (n., adj.) barrel sheet (n., adj.) (preferred term is “VCD” or standard graphic report) Barremian (Barrem.) Barriasian (Berrias.) Bartonian (Bart.) baseline basinward basinwide bathyal bbl 42-gallon barrel (US) [logging] BCR (1) Bremen Core Repository, (2) bicenter reamer [drilling] beadmaker bedform bedrock bedset belemnite Benioff zone benthic (not "benthonic"; adj., not used as noun) benthic taxa (n.; not “benthic”) bequerel (Bq) (SI unit of activity) 5 6 June 2021 IODP Dictionary BGS British Geological Survey BHA bottom-hole assembly [drilling] bifurcation bigradational bio- (generally closed up as a prefix) biochron biochronology biochronozone bioevent biogenic (not “biogenous”) biosiliceous (adj.) biozone birefringence bit [drilling] bit sub [drilling] BOH bottom of hole bolboformids Bølling-Allerød bootstrapping BOP blowout preventer [riser drilling] borehole BOSS BioOsmoSampler System botryoidal bottom water (n., adj.) bowspring (n., adj.) [logging] BP before present breakout brf below rig floor (as in mbrf, meters below rig floor) [drilling] BRG Borehole Research Group, Lamont-Doherty Earth Observatory Brunhes Chron BSE backscattered electron [SEM imaging] BSEM backscattering electron microscope [SEM imaging] bsf below seafloor (as in mbsf, meters below seafloor) [science] bsl below sea level (as in mbsl, meters below sea level) [science] BSR bottom-simulating reflector/reflection [science] buildup (n.) bulk density (n., adj.) bulkhead [ship] 6 6 June 2021 IODP Dictionary bulk-rock (adj.) bullnose [drilling] Bullseye vent bumper sub [drilling] Burdigalian (Burd.) by- (generally closed up as a prefix) bypass byproduct 7 6 June 2021 IODP Dictionary -C- C (1) degrees Celsius (unit of temperature = degrees Centigrade); (2) coulomb (unit of electrical charge) c/s counts per second (NGR unit; use “counts/s”) C1/C2 methane/ethane ratio [science, chemistry] C6+ hexane and higher hydrocarbons [science, chemistry] ca. circa (only used with age or time; IODP prefers “~” in all cases) CAB Curatorial Advisory Board cablehead [logging] CAE carbon accumulation event cal calorie (unit of energy) Calabrian (Cal.) calc-alkaline (adj.) calcareous (adj.) Campanian (Camp.) Carbonaceous (time period) carbonaceous (adj.) CARD-FISH catalyzed reporter deposition–fluorescence in situ hybridization [microbiology] casing [drilling] CASSI Chemical Abstracts Service Source Index cataclasis cataclasite cataclastic cathode cation catwalk [ship] CAVA Central American volcanic arc cave-in (n.) CB center bit [drilling] CC core catcher (n., adj.) [drilling] CCD (1) carbonate compensation depth/calcite compensation depth [science]; (2) charge-cou- pled device [imaging] CCSF core composite depth below seafloor C-DEBI Center for Dark Energy Biosphere Investigations CDEX Center for Deep Earth Exploration (obsolete; see MarE3) CDN Compensated Density Neutron tool [logging] cDNA copy deoxyribonucleic acid [science, microbiology] CDP (1) common depth point, (2) complex drilling project 8 6 June 2021 IODP Dictionary CDR Compensated Dual Resistivity [logging] CDT Canyon Diablo troilite [science, isotopes] CDW Circumpolar Deep Water celestine (not “celestite”) celestite (use “celestine”) Cello-Flake [drilling] Cenomanian (Cenom.) cenote Cenozoic (Cenoz.) central equatorial Pacific cf. compare (Latin confer; no comma follows) [biostratigraphy] CFU colony-forming unit; also “cfu” [science, microbiology] CGR computed gamma ray [logging] cgs centimeter-gram-second (magnetic susceptibility units; not generally used in IODP) chadacryst channel-levee (n., adj.) Chattian (Chatt.) check shot (n., adj.) [seismic] chemo- (generally closed up as a prefix) Chikyu CHIRP compressed high-intensity radar pulse CHNS carbon-hydrogen-nitrogen-sulfur analyzer; also “flash elemental analyzer” [science, chemistry] Chondrites ChRM characteristic remanent magnetization [science, paleomagnetism] chromatography chron chronostratigraphy chronozone CI (1) crystallization index; (2) contour interval Ci curie (unit of radiation) CIE carbon isotope excursion CIPW norm Cross, Iddings, Pirsson, and Washington; normative system for reporting XRD data circulating head [drilling] clastic clathrate [gas hydrate] claystone CLDC control length drill collar [drilling] 9 6 June 2021 IODP Dictionary clinoform close-up (n., adj.) cm centimeter cm3 (not “cc”) CMC crown-mounted heave compensator [CDEX] cmcd corrected meters composite depth CMP common midpoint [seismic] CMS Content Management System CNS Cocos-Nazca spreading center coarsening-downward (adj.) coarsening-upward (adj.) Cobb Mountain Subchron coccolithophore Cochiti Subchron coercivity cold seep (n.) cold-seep (adj.) cold water (n.) cold-water (adj.) compressional wave (n., adj.); also P-wave velocity; seismic wave conchoidal Coniacian (Coniac.) contact probe (n., adj.) coralgal core barrel [drilling] core bit [drilling] core liner [drilling] core scale (n.) core-scale (adj.) Corg organic carbon [science] coring [drilling] coring line [drilling] coring system [drilling] coring winch [drilling] CORK subsea observatory (do not need to define: circulation obviation retrofit kit) CORK-Lite counter- (generally closed up as a prefix) coverslip CPI carbon preference index [science, chemistry] CPO crystallographic preferred orientation 10 6 June 2021 IODP Dictionary